/**
 * Copyright 2020-9999 the original author or authors.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.mykit.ddns.pool;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

/**
 * @author binghe
 * @version 1.0.0
 * @description 调度线程池
 */
public class ScheduledThreadPool {

    private static volatile ScheduledExecutorService instance = null;

    static {
        instance = Executors.newScheduledThreadPool(3);
    }


    public static void schedule(Runnable command,  long initialDelay, long period, TimeUnit unit){
        instance.scheduleAtFixedRate(command, initialDelay, period, unit);
    }

    public static void shutdown(){
        instance.shutdown();
    }
}
